What's the location of Mythtv directory. I am trying to locate settings.pro

According to this site: http://www.mmalson.com/mythtv/-----------------Configuring the sound cardFor some reason, MythTV does not default to using the ALSA sound system. So, I had to edit the settings.pro file in the mythtv directory to uncomment the following lines: CONFIG += using_alsa ALSA_LIBS = -lasound---------------This may solve my problem of not having sound in MythTV Live TV.